Color polarizer with support for liquid crystal projector and color liquid crystal projector

A color polarizing plate with a support for a liquid crystal projector, comprising a polarizing plate containing a stilbene type water soluble azo dye and a J acid type water-soluble azo dye as a dichroic molecules and said support, wherein the stilbene type water-soluble azo dye is a reaction product between 4,4′-dinitro-2,2′-stilbenedisulfonic acid and a monoazo compound having an aminophenylazobenzene structure of the formula (1), as a free acid:

• wherein R1 and R2 independently represent a hydrogen atom, C1-C4 alkyl group or C1-C4 alkoxy group, R3 represents a sulfonic acid group or a carboxyl group and R4 represents a hydrogen atom, a hydroxyl group or C1-C4 alkoxy group;
• the J acid type water-soluble azo dye is represented by the formula (2), as a free acid:
• wherein R5 represents a sulfonic acid group or a carboxyl group, R6 represents a hydrogen atom, a hydroxyl group or C1-C4 alkoxy group, R7 and R8 independently represent a hydrogen atom, C1-C4 alkyl group or C1-C4 alkoxy group and R9 represents phenylamino group, benzoylamino group or p-amino benzoylamino group or 4-hydroxyphenyl-1-azo group;
• and
• the polarizing plate has an average single transmittance of 39% or more and an average crossed transmittance of 0.4% or less at 420 to 500 nm and an average crossed transmittance of 60% or more at 650 to 780 nm.